The Simpson 4 x 6 Column Base CB64 by Simpson is a structural connector engineered to secure posts to concrete foundations across a wide range of lumber, glulam, and engineered wood product sizes. Designed for cast-in-place or wet-set installation, the base plate sits flush with the concrete surface to provide full post bearing, delivering high structural values and rugged, long-lasting performance in demanding column applications - whether for residential decks, pergolas, covered structures, or commercial builds in wind- or seismic-prone regions.

Key Features

• Compatible with lumber, glulam, and engineered wood products - gives builders flexibility to use the connector across a variety of post materials and structural configurations without sourcing multiple hardware types.
• Cast-in-place or wet-set installation - allows the base plate to be set flush with the concrete surface during the pour, ensuring full post bearing and a cleaner, more stable foundation connection.
• Increased uplift resistance - specifically engineered to handle wind and seismic loading conditions, making this column base a reliable choice for structurally critical installations in high-demand environments.
• Bolt hole locations meet code-required spacing - helps contractors and builders maintain compliance with structural codes while achieving optimal load capacity without additional layout guesswork.
• Finished in Simpson Strong-Tie gray paint - provides a consistent, professional appearance and a baseline level of surface protection suited to typical column base applications.

Why This Product

• Versatile post-to-foundation connection - by accommodating lumber, glulam, and engineered wood products in a single connector design, this column base reduces the need for multiple part numbers on mixed-material projects.
• Built for code compliance from the start - bolt hole positioning is designed to meet code-required spacing, saving time during inspection and reducing the risk of costly field corrections.
• Engineered for wind and seismic conditions - the increased uplift resistance built into this column base makes it a dependable choice for post installations where lateral and vertical forces are a primary structural concern.
• American-made quality from a trusted structural hardware brand - produced by Simpson, a widely recognized name in structural connectors, this column base is built to consistent manufacturing standards for dependable field performance.

Specifications

• Manufacturer: Simpson Strong-Tie
• MPN: CB64
• Nominal Column Size: 4 x 6
• Finish: Simpson Strong-Tie gray paint
• Fasteners Required: Bolts - (2) 5/8" (sold separately)
• Width 1: 5-1/2 in.
• Width 2: 3-9/16 in.
• Country of Origin: United States

Options

• Contact us for Configurable Options and Special orders

Frequently Asked Questions

What types of wood products is the CB64 compatible with?

The CB64 column base is designed to connect posts to concrete foundations for a wide range of lumber, glulam, and engineered wood product sizes, making it a versatile choice for many structural applications.

How is the CB64 installed?

The CB64 is designed to be either cast-in-place or wet set into concrete. During installation, the bottom of the base plate sits flush with the concrete surface to ensure full post bearing.

What fasteners are required for the CB64?

The CB64 requires two (2) 5/8" bolts. The bolt hole locations are positioned to meet code-required spacing for optimal load capacity.

Is the CB64 suitable for high-wind or seismic regions?

Yes. The CB64 features increased uplift resistance specifically designed to handle the demands of wind and seismic loading conditions, making it well-suited for structurally critical column installations.

Note: Product dimensions and/or Screw or Bolt holes may differ from picture. Please see item description for specifications.